11213120121 has 16 divisors (see below), whose sum is σ = 17113089024. Its totient is φ = 6397586064.

The previous prime is 11213120111. The next prime is 11213120129. The reversal of 11213120121 is 12102131211.

11213120121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11213120121 - 2⁵ = 11213120089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11213120121.

It is not an unprimeable number, because it can be changed into a prime (11213120129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 399055 + ... + 426228.

It is an arithmetic number, because the mean of its divisors is an integer number (1069568064).

Almost surely, 2^11213120121 is an apocalyptic number.

It is an amenable number.

11213120121 is a deficient number, since it is larger than the sum of its proper divisors (5899968903).

11213120121 is an equidigital number, since it uses as much as digits as its factorization.

11213120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825940.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 11213120121 its reverse (12102131211), we get a palindrome (23315251332).

The spelling of 11213120121 in words is "eleven billion, two hundred thirteen million, one hundred twenty thousand, one hundred twenty-one".